Elastic wheel-tire.



No. 676,562. Patented lune l8, l90l. J. H. LANGGAARD. ELASTIC WHEEL TIRE.

(Application filed Apr. 16, 1901.)

(No Model.)

WIT )IE 55$:

UNITED STATES JENS H. LANGGAARD, OF LIVERPOOL, ENGLAND.

ELASTIC WHEEL-TIRE.

SPECIFICATION forming part of Letters Patent No. 676,562, dated June 18, 1901.

Application filed April 16, 1901. Serial No. 56,168. (No model.)

To all whom it may concern:

Be it known that I,J ENS HENRI LANGGAARD, a subject of the King of Great Britain, residing at 99 Tweed s,treet,Liverpool,in the county of Lancaster, England, have invented new and useful Improvements in Elastic WVheel- Tires, of which the followingis a specification.

This invention relates to elastic or cushion tires for road-vehiclessuch as light motorcarriages, velocipedes, and the likeand is embodied in an improved manufacture of tire in which there is a core made of specially prepared and treated corkinclosed in an envelop of india-rubber and canvas by which also the tire so made is secured to the folly of the wheel.

The object of this invention is to make a light, durable, and cheap form of elastic or cushion tire.

According to this invention the cork is specially treated in order to make it more durable and to increase its resiliency Without appreciably increasing the weight. The treatment consists in first removing the moisture from the cork by drying it with heat and then soaking the cork in pieces approximating in size those ofthe finished pieces of which the core of the tire is built up in raw linseed-oil until the pores and interstices of the cork are filled with it or until the cork is saturated with the oil. Afterward the cork is soaked in a watery solution of alum and permanganate of potash with a view to rendering the linseed-oil more viscous and the cork tougher and more durable. In order to remove superficial grease, I may afterward dip the cork pieces in a diluted solution of sulfuric acid.

The soaking of the cork pieces in linseedoil and in the alum and permanganate of potash takes some considerable tin1esay twelve to twenty days in the ordinary waybut I may facilitate this by means of suitable apparatussuch, for instance, as a sealed vessel having an air tight door and suitable valves, into which the cork pieces are placed, from which vessel the air can be exhausted and the liquids afterward introduced.

The relative proportions of the alum and permanganate of potash which I find suitable are to a pint of water two ounces of alum and one ounce of the permanganate.

it to the shape required.

cordance with my invention; but I may equally well treat it first and afterward form I form the core of the tire from solid pieces of cork in the form of segments of circles, such as a, Figs. 1 and 2, and of the section desired. Each segment a may be grooved longitudinally, as shown at a. The cork core A is inclosed by a cover B, consisting of an india-rubber tread I), having a lining of canvas 6. The cover is used to secure the core to the felly.D and may be fixed in any ordinary known way. For instance, the felly is formed with turned-in edges d, as shown, and the cover is provided with segmental metal strips d, secured to its lower sides or bottom and projecting outward, so as to engage the said edges (1. The cover I) may be slit longitudinally along the base of the tire, to the edges or margins of which the'segmental strips 01 are secured.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. An elastic wheel-tire composed of an an nular sheath of india-rubber and canvas and a core of solid cork segments, said segments being first saturated with linseed-oil and afterward immersed in a saturated solution of alum and permanganate of potash substantially as set forth.

2. The method of treating cork for forming the cores of elastic wheel tires, which consists in first evaporating the moisture in the cork by heat, then saturating the cork in raw linseed-oil and afterward immersing it in a bath of alum and permanganate of potash, substantially as and for the purpose set forth.

3. The combination of a wheel-folly externally grooved, an annular sheath of india rubber and canvas having an opening along its internal periphery and fixed in the said grooved felly, and a core of solid cork segp name to this specification in the presence of ments packed closely in the said sheath, said two subscribing witnesses. cork segments being first dried,then saturated with linseed-oil and afterward immersed in a LANGGAARD' 5 saturated solution of alum and permanganate Witnesses:

of potash, substantially as set forth. R. J. URQUHART, In testimony whereof I have signed my WM. H. BROAD. 

